We divide 75515431 by 840
We want to divide 75515431 by 840.

Moving on to step 1:
When dividing 7 by 840, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 840

Step 2:
The number 840 fits into 75 0 times, leaving a remainder of 75.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 75 after subtracting 0 from 75.
Grab the next digit (5) from the dividend, add it to 75, then carry on: 755 / 840

Step 3:
840 goes into 755 0 times with a remainder of 755.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 755 after subtracting 0 from 755.
Bring next digit (1) of the dividend behind the 755 and repeat the process: 7551 / 840

Advancing to step 4:
If we divide 7551 by 840, we get 8 and a remainder of 831.
The next digit of our result is 8. 
Result so far: 8.0
If we take 6720 away from 7551, we end up with 831.
Include the next digit (5) from the dividend after 831, then repeat: 8315 / 840

Let's proceed to step 5:
840 goes into 8315 9 times with a remainder of 755.
The next digit of our result is 9. 
Result so far: 89.0
Deduct 7560 from 8315 and we're left with 755.
Append the next digit (4) from the dividend to 755 and continue with: 7554 / 840

Step 6:
The number 840 fits into 7554 8 times, leaving a remainder of 834.
Record the quotient 8 as the next digit in the result. 
Result so far: 898.0
Subtracting 6720 from 7554 leaves us with 834.
Bring next digit (3) of the dividend behind the 834 and repeat the process: 8343 / 840

Going ahead to step 7:
The number 840 fits into 8343 9 times, leaving a remainder of 783.
Write down 9 as next digit of the result. 
Result so far: 8989.0
If we take 7560 away from 8343, we end up with 783.
Bring next digit (1) of the dividend behind the 783 and repeat the process: 7831 / 840

Advancing to step 8:
When dividing 7831 by 840, we get 9 with a remainder of 271.
Record the quotient 9 as the next digit in the result. 
Result so far: 89899.0
If we take 7560 away from 7831, we end up with 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Let's proceed to step 9:
2710 divided by 840 is 3 with a remainder of 190.
Put 3 as the next digit of the answer. 
Result so far: 89899.3
Deduct 2520 from 2710 and we're left with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Moving on to step 10:
When dividing 1900 by 840, we get 2 with a remainder of 220.
The number 2 becomes the next digit in our result. 
Result so far: 89899.32
The remainder is 220 after subtracting 1680 from 1900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Advancing to step 11:
If we divide 2200 by 840, we get 2 and a remainder of 520.
The number 2 becomes the next digit in our result. 
Result so far: 89899.322
If we subtract 1680 from 2200, we get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Our division results in 89899.322 with a remaining 0.052.